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Finding the Fourth Proportional to 433.55, 650.91 and 426.26

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Solution

The fourth proportional to 433.55, 650.91 and 426.26 is: 639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.55 : 650.91 = 426.26 : x
  2. Step 2: Convert to fraction form
    433.55/650.91 = 426.26/x
  3. Step 3: Cross multiply
    433.55x = 650.91 × 426.26
  4. Step 4: Simplify right side
    433.55x = 277,456.90
  5. Step 5: Solve for x
    x = 277,456.90/433.55
  6. Step 6: Final answer
    x = 639.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.